Communication of system information

Abstract

Methods and apparatuses for communication of system information. A method of a user equipment (UE) in a wireless communication system includes receiving a synchronization signals and physical broadcast channel (SS/PBCH) block including a primary synchronization signal (PSS) and a secondary synchronization signal (SSS), determining, based on the SS/PBCH block, configurations for a first control resource set (CORESET) to monitor a first physical downlink control channel (PDCCH), and receiving the first PDCCH based on the first CORESET. The method further includes determining, based on the first PDCCH, configurations related to a request for a system information block, and configurations for a second CORESET to monitor a second PDCCH, transmitting the request for the system information block, receiving the second PDCCH based on the second CORESET, and receiving a physical downlink shared channel (PDSCH) scheduled by the second PDCCH, wherein the PDSCH includes the system information block.

What is claimed is: 
     
         1 . A base station (BS) in a wireless communication system, the BS comprising:
 a processor configured to:
 determine configurations for a first control resource set (CORESET) to monitor a first physical downlink control channel (PDCCH); 
 determine configurations related to a request for a system information block; and 
 determine configurations for a second CORESET to monitor a second PDCCH; and 
   a transceiver operably coupled to the processor, the transceiver configured to:
 transmit a synchronization signals and physical broadcast channel (SS/PBCH) block including a primary synchronization signal (PSS) and a secondary synchronization signal (SSS), wherein the SS/PBCH block includes the configurations for the first CORESET; 
 transmit the first PDCCH based on the first CORESET, wherein the first PDCCH includes (i) the configurations related to the request for the system information block and (ii) the configurations for the second CORESET; 
 receive the request for the system information block; 
 transmit the second PDCCH based on the second CORESET; and 
 transmit a physical downlink shared channel (PDSCH) scheduled by the second PDCCH, wherein the PDSCH includes the system information block. 
   
     
     
         2 . The BS of  claim 1 , wherein the first CORESET is frequency division multiplexed (FDMed) with the SS/PBCH block. 
     
     
         3 . The BS of  claim 1 , wherein the configurations for the first CORESET are included in a master information block (MIB) of the SS/PBCH block. 
     
     
         4 . The BS of  claim 1 , wherein a first starting symbol for a search space set to monitor the first PDCCH is aligned with a second starting symbol of the SS/PBCH block. 
     
     
         5 . The BS of  claim 1 , wherein:
 the processor is further configured to determine, based on the first PDCCH, configurations for a downlink indication including a confirmation on the request for the system information block; and   the transceiver is further configured to transmit the downlink indication.   
     
     
         6 . The BS of  claim 1 , wherein the configurations related to the request for the system information block and the configurations for the second CORESET are included in a downlink control information (DCI) format carried by the first PDCCH. 
     
     
         7 . The BS of  claim 1 , wherein:
 a first de-modulation reference signal (DM-RS) associated with the first PDCCH is quasi-co-located (QCLed) with the SS/PBCH block; and   a second DM-RS associated with the second PDCCH is QCLed with the SS/PBCH block.   
     
     
         8 . A user equipment (UE) in a wireless communication system, the UE comprising:
 a transceiver configured to receive a synchronization signals and physical broadcast channel (SS/PBCH) block including a primary synchronization signal (PSS) and a secondary synchronization signal (SSS); and   a processor operably coupled to the transceiver, the processor configured to determine, based on the SS/PBCH block, configurations for a first control resource set (CORESET) to monitor a first physical downlink control channel (PDCCH);   wherein the transceiver is further configured to receive the first PDCCH based on the first CORESET,   wherein the processor is further configured to determine, based on the first PDCCH, (i) configurations related to a request for a system information block and (ii) configurations for a second CORESET to monitor a second PDCCH, and   wherein the transceiver is further configured to:
 transmit the request for the system information block; 
 receive the second PDCCH based on the second CORESET; and 
 receive a physical downlink shared channel (PDSCH) scheduled by the second PDCCH, wherein the PDSCH includes the system information block. 
   
     
     
         9 . The UE of  claim 8 , wherein the first CORESET is frequency division multiplexed (FDMed) with the SS/PBCH block. 
     
     
         10 . The UE of  claim 8 , wherein the configurations for the first CORESET are included in a master information block (MIB) of the SS/PBCH block. 
     
     
         11 . The UE of  claim 8 , wherein a first starting symbol for a search space set to monitor the first PDCCH is aligned with a second starting symbol of the SS/PBCH block. 
     
     
         12 . The UE of  claim 8 , wherein:
 the processor is further configured to determine, based on the first PDCCH, configurations for a downlink indication including a confirmation on the request for the system information block; and   the transceiver is further configured to receive the downlink indication.   
     
     
         13 . The UE of  claim 8 , wherein the configurations related to the request for the system information block and the configurations for the second CORESET are included in a downlink control information (DCI) format carried by the first PDCCH. 
     
     
         14 . The UE of  claim 8 , wherein:
 a first de-modulation reference signal (DM-RS) associated with the first PDCCH is quasi-co-located (QCLed) with the SS/PBCH block; and   a second DM-RS associated with the second PDCCH is QCLed with the SS/PBCH block.   
     
     
         15 . A method of a user equipment (UE) in a wireless communication system, the method comprising:
 receiving a synchronization signals and physical broadcast channel (SS/PBCH) block including a primary synchronization signal (PSS) and a secondary synchronization signal (SSS);   determining, based on the SS/PBCH block, configurations for a first control resource set (CORESET) to monitor a first physical downlink control channel (PDCCH);   receiving the first PDCCH based on the first CORESET;   determining, based on the first PDCCH, (i) configurations related to a request for a system information block, and (ii) configurations for a second CORESET to monitor a second PDCCH;   transmitting the request for the system information block;   receiving the second PDCCH based on the second CORESET; and   receiving a physical downlink shared channel (PDSCH) scheduled by the second PDCCH, wherein the PDSCH includes the system information block.   
     
     
         16 . The method of  claim 15 , wherein the first CORESET is frequency division multiplexed (FDMed) with the SS/PBCH block. 
     
     
         17 . The method of  claim 15 , wherein:
 the configurations for the first CORESET are included in a master information block (MIB) of the SS/PBCH block; and   a first starting symbol for a search space set to monitor the first PDCCH is aligned with a second starting symbol of the SS/PBCH block.   
     
     
         18 . The method of  claim 15 , further comprising:
 determining, based on the first PDCCH, configurations for a downlink indication including a confirmation on the request for the system information block; and   receiving the downlink indication.   
     
     
         19 . The method of  claim 15 , wherein the configurations related to the request for the system information block and the configurations for the second CORESET are included in a downlink control information (DCI) format carried by the first PDCCH. 
     
     
         20 . The method of  claim 15 , wherein:
 a first de-modulation reference signal (DM-RS) associated with the first PDCCH is quasi-co-located (QCLed) with the SS/PBCH block; and   a second DM-RS associated with the second PDCCH is QCLed with the SS/PBCH block.